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对太湖地区2种主要水稻土类型白土和乌栅土在土壤剖面中氮素和速效磷含量的空间变异进行了研究。结果显示:NH4+-N在土壤剖面中的空间变异为从土壤上层到下层呈逐渐递减趋势,以表土层含量为最高,表层以下基本上趋于稳定;硝态氮含量随土层深度的加深呈现逐渐降低的趋势。速效磷的空间变异不如NH4+-N明显,白土中速效磷呈由表层随土层深度的增加而增加,在12~20 cm土层达到最大,接着又随土层深度的增加而降低,乌栅土基本呈逐渐下降的趋势;2种土壤中pH值变化不大,但均呈升高趋势。
Spatial variability of nitrogen and phosphorus content in soil profiles of two main soils of paddy soil type and soil in the Taihu Lake region was studied. The results showed that the spatial variability of NH4 + -N in the soil profile decreased gradually from upper soil layer to lower layer, with the content of top soil layer being the highest, while that below the surface layer basically stabilized. The content of nitrate nitrogen increased with the depth of soil layer Gradually reduce the trend. Available phosphorus spatial variability is not as obvious as NH4 + -N, available available phosphorus in the clay surface layer increases with the depth of soil depth, reaching the maximum in 12 ~ 20 cm soil layer, and then with the depth of soil depth increases, Soil basically showed a gradual downward trend; two kinds of soil pH changes little, but all showed an upward trend.